I have partially addressed the issue of excessive appetite in How To Get Rid Of Bad Anxiety Habits, and this article provides a more in-depth coverage.
There are hundreds of various diets available. You can try one after another and get no long term results. The problem is not which diet to choose, but how to stick to it for long periods of time. The hardest part is doing it for a long period of time, and the main obstacle is the appetite.
You may have not known this, but having extra pounds requires more calories and therefore increased appetite. So it’s a chicken and egg problem. You want to lose those extra pounds, but those pounds make you eat even more.
So the key to a successful diet is in reducing the appetite. And the rest will follow.